may overbook
Regular verb: overbook - overbooked- overbooked

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may overbook
you may overbook
he may overbook
we may overbook
you may overbook
they may overbook 	I may be overbooking
you may be overbooking
he may be overbooking
we may be overbooking
you may be overbooking
they may be overbooking	I may have overbooked
you may have overbooked
he may have overbooked
we may have overbooked
you may have overbooked
they may have overbooked	I may have been overbooking
you may have been overbooking
he may have been overbooking
we may have been overbooking
you may have been overbooking
they may have been overbooking	

Negation 	
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I mayn't overbook
you mayn't overbook
he mayn't overbook
we mayn't overbook
you mayn't overbook
they mayn't overbook 	I mayn't be overbooking
you mayn't be overbooking
he mayn't be overbooking
we mayn't be overbooking
you mayn't be overbooking
they mayn't be overbooking	I mayn't have overbooked
you mayn't have overbooked
he mayn't have overbooked
we mayn't have overbooked
you mayn't have overbooked
they mayn't have overbooked	I mayn't have been overbooking
you mayn't have been overbooking
he mayn't have been overbooking
we mayn't have been overbooking
you mayn't have been overbooking
they mayn't have been overbooking	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I overbook?
may you overbook?
may he overbook?
may we overbook?
may you overbook?
may they overbook? 	may I be overbooking?
may you be overbooking?
may he be overbooking?
may we be overbooking?
may you be overbooking?
may they be overbooking? 	may I have overbooked?
may you have overbooked?
may he have overbooked?
may we have overbooked?
may you have overbooked?
may they have overbooked? 	may I have been overbooking?
may you have been overbooking?
may he have been overbooking?
may we have been overbooking?
may you have been overbooking?
may they have been overbooking? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mayn't I overbook?
mayn't you overbook?
mayn't he overbook?
mayn't we overbook?
mayn't you overbook?
mayn't they overbook? 	mayn't I be overbooking?
mayn't you be overbooking?
mayn't he be overbooking?
mayn't we be overbooking?
mayn't you be overbooking?
mayn't they be overbooking? 	mayn't I have overbooked?
mayn't you have overbooked?
mayn't he have overbooked?
mayn't we have overbooked?
mayn't you have overbooked?
mayn't they have overbooked? 	mayn't I have been overbooking?
mayn't you have been overbooking?
mayn't he have been overbooking?
mayn't we have been overbooking?
mayn't you have been overbooking?
mayn't they have been overbooking?